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Video image processing method, device, and video coding system

A technology of video image and processing method, which is applied in the field of processing video frames in YUV format, to achieve fast calculation process, avoid image color distortion and unsatisfactory overall contrast, and avoid overall brightening and color oversaturation of the image Effect

Inactive Publication Date: 2018-05-22
深圳市优朋普乐传媒发展有限公司
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for video image denoising and contrast enhancement, to solve the problems existing in the process of denoising and contrast enhancement of YUV format video images in the prior art

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  • Video image processing method, device, and video coding system
  • Video image processing method, device, and video coding system
  • Video image processing method, device, and video coding system

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention.

[0028] The YUV video system is a color coding method adopted by the European television system. It is the color space adopted by the PAL and SECAM analog color TV systems, where Y: represents the brightness (Luminance or Luma), that is, the gray value; U and V : Indicates chroma (Chrominance or Chroma), describes the color and saturation of the image, and specifies the color of the pixel. If the video stream is in the form of RGB, three independent video signals of R, G and B are required to be transmitted simultaneously during the transmission process. Unlike the video stream in YUV form,...

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Abstract

The invention discloses a video image denoising and contrast enhancement method and device. The method includes the following steps that: a video file in a YUV format is obtained and is divided into aplurality of video frames; Y, U, and V components in each frame of image in the plurality of video frames are read; guided filtering denoising, contrast limited adaptive histogram equalization, and piecewise linear stretching are performed on the Y components; and Y components which are obtained after the stretching operation is performed are synthesized with the original U and V components of the frames, so that new YUV video image frames can be obtained. With the method adopted, mutual conversion between an RGB format and a YUV format is not required; only the Y components are processed; the problems of the overall excessive brightness and color undersaturation of images which are caused by a condition that an R channel, a G channel and a B channel are denoised simultaneously in the prior art can be solved; and the problems of the color distortion and unsatisfactory overall contrast of images which are caused by a condition that a Y component, a U component and a V component are simultaneously subjected to contrast enhancement can be solved.

Description

technical field [0001] The invention belongs to the technical field of video image processing, and in particular relates to a method and a device for processing video frames in YUV format, and a video coding system including the device. Background technique [0002] During the process of transmission and storage of video images, they will be disturbed by noise, which will degrade the quality of the video, and adversely affect the subsequent video processing and viewing. In order to suppress noise, improve video quality, and facilitate subsequent higher-level processing, it is usually necessary to perform denoising and contrast enhancement processing on video. [0003] Existing video denoising and contrast enhancement methods are all carried out in RGB color mode. When the input video object to be processed is YUV data, it is often necessary to convert YUV to RGB form first, and then perform denoising and contrast enhancement. processing, and finally convert the processed RG...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06T5/40G06T5/50
CPCG06T5/40G06T5/50G06T2207/10016G06T2207/20012G06T5/92G06T5/70
Inventor 罗秀玲
Owner 深圳市优朋普乐传媒发展有限公司
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